The speciation of homochiral and heterochiral diastereomers of homoleptic cobalt(II) and zinc(II) PyBox complexes.
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| Title: | The speciation of homochiral and heterochiral diastereomers of homoleptic cobalt(II) and zinc(II) PyBox complexes. |
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| Authors: | Burrows, Kay E.1, Kulmaczewski, Rafal1, Cespedes, Oscar2, Barrett, Simon A.1, Halcrow, Malcolm A.1 m.a.halcrow@leeds.ac.uk |
| Source: | Polyhedron. Jul2018, Vol. 149, p134-141. 8p. |
| Subjects: | Diastereoisomers, Pyridyl compounds, Supramolecular chemistry, Mass spectrometry methodology, Ether (Anesthetic) |
| Abstract: | Homochiral [M(( R )- L R ) 2 ] 2+ and heterochiral [M(( R )- L R )(( S )- L R )] 2+ isomers of [Zn( L Ph ) 2 ][BF 4 ] 2 , [Zn( L i Pr ) 2 ][BF 4 ] 2 , [Co( L Ph ) 2 ][BF 4 ] 2 , and [Co( L i Pr ) 2 ][BF 4 ] 2 ( L Ph = 2,6- bis (4-phenyloxazolinyl)pyridine; L i Pr = 2,6- bis (4- iso propyloxazolinyl)pyridine) have been prepared and characterised. Six of the eight compounds were crystallographically characterised, showing that steric repulsions between ligand substituents lead to more distorted coordination geometries in the homochiral isomers, especially in the L i Pr complexes. Heterochiral [M(( R )- L i Pr )(( S )- L i Pr )] 2+ (M = Zn or Co) undergoes partial racemisation in CD 3 CN through ligand redistribution reactions, whereas [M(( R )- L Ph )(( S )- L Ph )] 2+ does not (in agreement with previous reports). This may be a consequence of intramolecular π … π -interactions in [M(( R )- L Ph )(( S )- L Ph )] 2+ , whereby each pyridyl group is sandwiched between two phenyl substituents from the other L Ph ligand. These π … π -interactions are disrupted in homochiral [M(( R )- L R ) 2 ] 2+ , owing to the aforementioned steric clash between phenyl substituents in that isomer. [ABSTRACT FROM AUTHOR] |
| Copyright of Polyhedron is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 129753903 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: The speciation of homochiral and heterochiral diastereomers of homoleptic cobalt(II) and zinc(II) PyBox complexes. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Burrows%2C+Kay+E%2E%22">Burrows, Kay E.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Kulmaczewski%2C+Rafal%22">Kulmaczewski, Rafal</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Cespedes%2C+Oscar%22">Cespedes, Oscar</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Barrett%2C+Simon+A%2E%22">Barrett, Simon A.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Halcrow%2C+Malcolm+A%2E%22">Halcrow, Malcolm A.</searchLink><relatesTo>1</relatesTo><i> m.a.halcrow@leeds.ac.uk</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Polyhedron%22">Polyhedron</searchLink>. Jul2018, Vol. 149, p134-141. 8p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Diastereoisomers%22">Diastereoisomers</searchLink><br /><searchLink fieldCode="DE" term="%22Pyridyl+compounds%22">Pyridyl compounds</searchLink><br /><searchLink fieldCode="DE" term="%22Supramolecular+chemistry%22">Supramolecular chemistry</searchLink><br /><searchLink fieldCode="DE" term="%22Mass+spectrometry+methodology%22">Mass spectrometry methodology</searchLink><br /><searchLink fieldCode="DE" term="%22Ether+%28Anesthetic%29%22">Ether (Anesthetic)</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Homochiral [M(( R )- L R ) 2 ] 2+ and heterochiral [M(( R )- L R )(( S )- L R )] 2+ isomers of [Zn( L Ph ) 2 ][BF 4 ] 2 , [Zn( L i Pr ) 2 ][BF 4 ] 2 , [Co( L Ph ) 2 ][BF 4 ] 2 , and [Co( L i Pr ) 2 ][BF 4 ] 2 ( L Ph = 2,6- bis (4-phenyloxazolinyl)pyridine; L i Pr = 2,6- bis (4- iso propyloxazolinyl)pyridine) have been prepared and characterised. Six of the eight compounds were crystallographically characterised, showing that steric repulsions between ligand substituents lead to more distorted coordination geometries in the homochiral isomers, especially in the L i Pr complexes. Heterochiral [M(( R )- L i Pr )(( S )- L i Pr )] 2+ (M = Zn or Co) undergoes partial racemisation in CD 3 CN through ligand redistribution reactions, whereas [M(( R )- L Ph )(( S )- L Ph )] 2+ does not (in agreement with previous reports). This may be a consequence of intramolecular π … π -interactions in [M(( R )- L Ph )(( S )- L Ph )] 2+ , whereby each pyridyl group is sandwiched between two phenyl substituents from the other L Ph ligand. These π … π -interactions are disrupted in homochiral [M(( R )- L R ) 2 ] 2+ , owing to the aforementioned steric clash between phenyl substituents in that isomer. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Polyhedron is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.poly.2018.04.030 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 8 StartPage: 134 Subjects: – SubjectFull: Diastereoisomers Type: general – SubjectFull: Pyridyl compounds Type: general – SubjectFull: Supramolecular chemistry Type: general – SubjectFull: Mass spectrometry methodology Type: general – SubjectFull: Ether (Anesthetic) Type: general Titles: – TitleFull: The speciation of homochiral and heterochiral diastereomers of homoleptic cobalt(II) and zinc(II) PyBox complexes. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Burrows, Kay E. – PersonEntity: Name: NameFull: Kulmaczewski, Rafal – PersonEntity: Name: NameFull: Cespedes, Oscar – PersonEntity: Name: NameFull: Barrett, Simon A. – PersonEntity: Name: NameFull: Halcrow, Malcolm A. IsPartOfRelationships: – BibEntity: Dates: – D: 15 M: 07 Text: Jul2018 Type: published Y: 2018 Identifiers: – Type: issn-print Value: 02775387 Numbering: – Type: volume Value: 149 Titles: – TitleFull: Polyhedron Type: main |
| ResultId | 1 |
